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Reports code on which an unchecked warning will be issued by the javac compiler.
Every unchecked warning may potentially trigger <code>ClassCastException</code> at runtime.
<p>Example:</p>
<pre><code>
  List items = Arrays.asList("string", "string");
  List&lt;Integer&gt; numbers = Collections.unmodifiableList(items); // unchecked assignment
</code></pre>
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